Slack Error Notifications

{

"description": "Send Slack notifications when Claude Code encounters long-running operations or when tools take significant time. Helps monitor productivity and catch potential issues. Requires SLACK_WEBHOOK_URL environment variable.",

"hooks": {

"PreToolUse": [

{

"matcher": "Bash",

"hooks": [

{

"type": "command",

"command": "if [[ -n \"$SLACK_WEBHOOK_URL\" ]]; then echo \"$(date +%s)\" > ~/.claude/bash_start.tmp; fi"

}

]

}

],

"PostToolUse": [

{

"matcher": "Bash",

"hooks": [

{

"type": "command",

"command": "if [[ -n \"$SLACK_WEBHOOK_URL\" && -f ~/.claude/bash_start.tmp ]]; then END_TIME=\"$(date +%s)\"; START_TIME=\"$(cat ~/.claude/bash_start.tmp)\"; DURATION=\"$((END_TIME - START_TIME))\"; rm -f ~/.claude/bash_start.tmp; if [[ $DURATION -gt 30 ]]; then MINUTES=\"$((DURATION / 60))\"; SECONDS=\"$((DURATION % 60))\"; MESSAGE='{\"blocks\":[{\"type\":\"header\",\"text\":{\"type\":\"plain_text\",\"text\":\"⚠️ Long Bash Operation\"}},{\"type\":\"section\",\"fields\":[{\"type\":\"mrkdwn\",\"text\":\"⏱️ Duration:\\n'\"${MINUTES}\"'m '\"${SECONDS}\"'s\"},{\"type\":\"mrkdwn\",\"text\":\"📁 Project:\\n'\"$(basename \"$(pwd)\")\"'\"},{\"type\":\"mrkdwn\",\"text\":\"⏰ Time:\\n'\"$(date '+%H:%M:%S')\"'\"}]}]}'; curl -s -X POST \"$SLACK_WEBHOOK_URL\" -H \"Content-type: application/json\" -d \"$MESSAGE\" >/dev/null 2>&1; fi; fi"

}

]

}

],

"Notification": [

{

"hooks": [

{

"type": "command",

"command": "if [[ -n \"$SLACK_WEBHOOK_URL\" ]]; then MESSAGE='{\"blocks\":[{\"type\":\"header\",\"text\":{\"type\":\"plain_text\",\"text\":\"🔔 Claude Code Notification\"}},{\"type\":\"section\",\"fields\":[{\"type\":\"mrkdwn\",\"text\":\"📁 Project:\\n'\"$(basename \"$(pwd)\")\"'\"},{\"type\":\"mrkdwn\",\"text\":\"⏰ Time:\\n'\"$(date '+%H:%M:%S')\"'\"},{\"type\":\"mrkdwn\",\"text\":\"💬 Status:\\nWaiting for user input or permission\"}]}]}'; curl -s -X POST \"$SLACK_WEBHOOK_URL\" -H \"Content-type: application/json\" -d \"$MESSAGE\" >/dev/null 2>&1; fi"

}

]

}

]

}

}